Robertshaw 9401 - Manual (Page 6)

15. Set the GAS/ELEC switch to either GAS for a gas/oil heating
system or ELEC for an electric heating system (Figure 6).
16. Set the HP/NON-HP switch to either the HP for heat pump or
NON-HP for furnace applications (Figure 6).
17. Replace thermostat cover by snapping into place.
6
RESET
NON-HP HP
ELEC GAS
ROOM
OFF
NON-HP/HP
Switch
GAS/ELECTRIC
Switch
Figure 6
d
TERMINAL LEGEND - 9401
TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION
Rh 24VAC hot connection Yes For input of 24VAC hot
side of heat transformer
Rc 24VAC hot connection Yes For input of 24VAC hot
side of cool transformer
C 24VAC common connection Yes For input of 24VAC
common side of
transformer
W Heat connection Yes* Energizes on a call for
heating
Y Compressor Connection Yes* Energizes on a call for
cooling
B Heat Active Reversing Valve No Energizes when in the
HEAT mode
O Cool Active Reversing Valve No Energizes when in the
COOL mode
G Indoor fan connection Yes Energizes with Y & W
terminals in electric
mode; or with Y terminal
in gas mode; or with FAN
option switched to the
ON position
* This thermostat can be used as a heat only or cool only thermostat therefore it is not always
necessary to use both Y and W.